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                # Day 7 - 編寫MVC 現在,ORM框架、Web框架和配置都已就緒,我們可以開始編寫一個最簡單的MVC,把它們全部啟動起來。 通過Web框架的@decorator和ORM框架的Model支持,可以很容易地編寫一個處理首頁URL的函數: ``` # urls.py from transwarp.web import get, view from models import User, Blog, Comment @view('test_users.html') @get('/') def test_users(): users = User.find_all() return dict(users=users) ``` `@view`指定的模板文件是`test_users.html`,所以我們在模板的根目錄`templates`下創建`test_users.html`: ``` <!DOCTYPE html> <html> <head> <meta charset="utf-8" /> <title>Test users - Awesome Python Webapp</title> </head> <body> <h1>All users</h1> {% for u in users %} <p>{{ u.name }} / {{ u.email }}</p> {% endfor %} </body> </html> ``` 接下來,我們創建一個Web App的啟動文件`wsgiapp.py`,負責初始化數據庫、初始化Web框架,然后加載`urls.py`,最后啟動Web服務: ``` # wsgiapp.py import logging; logging.basicConfig(level=logging.INFO) import os from transwarp import db from transwarp.web import WSGIApplication, Jinja2TemplateEngine from config import configs # 初始化數據庫: db.create_engine(**configs.db) # 創建一個WSGIApplication: wsgi = WSGIApplication(os.path.dirname(os.path.abspath(__file__))) # 初始化jinja2模板引擎: template_engine = Jinja2TemplateEngine(os.path.join(os.path.dirname(os.path.abspath(__file__)), 'templates')) wsgi.template_engine = template_engine # 加載帶有@get/@post的URL處理函數: import urls wsgi.add_module(urls) # 在9000端口上啟動本地測試服務器: if __name__ == '__main__': wsgi.run(9000) ``` 如果一切順利,可以用命令行啟動Web服務器: ``` $ python wsgiapp.py ``` 然后,在瀏覽器中訪問`http://localhost:9000/`。 如果數據庫的`users`表什么內容也沒有,你就無法在瀏覽器中看到循環輸出的內容。可以自己在MySQL的命令行里給`users`表添加幾條記錄,然后再訪問: ![awesomepy-all-users](https://box.kancloud.cn/2016-01-15_56988a2ac4261.png)
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